#include <bits/stdc++.h>
using namespace std;

using i64 = int64_t;
using u64 = uint64_t;
using vi64 = vector<i64>;
using vu64 = vector<u64>;
using vvi64 = vector<vi64>;
using vvu64 = vector<vu64>;

#define rep(i,n) for(int i=0, i##_len=(n); i<i##_len; ++i)
#define ALL(x) (x).begin(),(x).end()
#define RALL(obj) (obj).rbegin(),(obj).rend()
#define SZ(x) ((int)(x).size())
#define PRINT(n) cout << (n) << "\n";

int dx[4] = {1, 0, -1, 0};
int dy[4] = {0, 1, 0, -1};

void YESorNO(bool p) {
  cout << (p ? "YES" : "NO") << endl;
  return;
}

void vprint(vi64 A) {
  i64 L = A.size();
  for (int i = 0; i < L; i++) {
    if (i) cout << ' ';
    cout << setfill('0') << right << setw(3) << A[i];
  }
  cout << '\n';
}

void run() {
  int n;
  cin >> n;
  vvi64 a(n, vi64(n, 0));
  i64 x = -1;
  i64 y = 0;
  i64 d = 0;
  i64 id = 1;
  i64 loop = 1000;
  while (loop--) {
    i64 tx = x;
    i64 ty = y;
    if (d == 0) tx++;
    else if (d == 1) ty++;
    else if (d == 2) ty--;
    else ty--;
    if (0 <= tx && tx < n && 0 <= ty && ty < n && a[ty][tx] == 0) {
      a[ty][tx] = id;
      id++;
      x = tx;
      y = ty;
    }
    else {
      d++;
      d %= 4;
    }
  }

  rep(i,n) vprint(a[i]);

  return;
}

int main() {
  cin.tie(nullptr);
  ios_base::sync_with_stdio(false);
  run();
  return 0;
}